docs: def get_queryset(self):
          """ Returns the list of items for this view. """
          self.forum = self.get_forum()
          qs = (
              self.forum.topics
              .exclude(type=Topic.TOPIC_ANNOUNCE)
              .exclude(approved=False)
              .select_related('poster', 'last_post', 'last_post__poster')
          )
          return qs